THREAT OPS › Threat News › Cisco IOS XR Software Security Hardening Release: September 2026
Cisco IOS XR Software Security Hardening Release: September 2026
<p>As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco IOS XR Software engineering team has conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities. </p> <p>These vulnerabilities were found during internal testing and are not known to be actively
MITRE ATT&CK techniques
- VulnerabilitiesT1588.006
Indicators of compromise
- CVE-2026-20274cve
- CVE-2026-20275cve
- CVE-2026-20276cve
- CVE-2026-20277cve
- CVE-2026-20278cve
- CVE-2026-20279cve
- CVE-2026-20280cve